Centrifugal governor, particularly applicable for the alteration of ignition or injection timing in internal combustion engines

Abstract

A centrifugal governor is proposed which has particular applicability to the rpm-dependent variation of ignition or injection timing in internal combustion engines. The centrifugal governor is comprised primarily of a driving shaft and a driven shaft and of a governor disc removably connected with the driven shaft. One eccentric pair is situated on the governor disc for each flyweight; each eccentric pair is coupled with the driven shaft, which serves as the camshaft of an injection pump and may be rotated by the flyweights articulated on the eccentrics in order to vary the mutual rotary position of both shafts.

What is claimed is: 
     
       1. A centrifugal governor comprising first and second coaxial rotary members between which a driving connection is established such that, in use of the governor, the relative rotational position between the two rotary members varies in accordance with their speed, said first rotary member being in the form of an annular member defining within its periphery a space into which said second rotary member projects, said second rotary member including a bearing flange, the governor further comprising: (a) a disc releasably attached to said first rotary member, said disc having plane parallel faces;   (b) two eccentric pairs, each comprising an adjusting eccentric and a compensating eccentric, the adjusting eccentric being mounted for rotation in said disc and the compensating eccentric being mounted for rotation in the adjusting eccentric, the compensating eccentric being articulatedly connected to said flange by a pin mounted at an eccentric position on the compensating eccentric; and   (c) two flyweights, each articulatedly connected to a respective adjusting eccentric by, on the side thereof facing away from said flange, a pin mounted at an eccentric position on the adjusting eccentric.   
     
     
       2. A centrifugal governor as claimed in claim 1, in which said first rotary member is provided with elongate holes and the disc is releasably attached to the first rotary member by bolts passing through said holes whereby, by slackening said bolts, an initial rotary adjustment is obtainable between said disc and said first rotary member. 
     
     
       3. A centrifugal governor as claimed in claim 1, in which said flange is received in an annular grovved-shaped cavity defined by a face of said disc and by a cylindrical recess provided in said first rotary member, whereby an axial and radial bearing is provided for said first rotary member. 
     
     
       4. A centrifugal governor as claimed in claim 1, in which said first rotary member includes an annular element having an inner surface which forms an outer stop for said flyweights. 
     
     
       5. A centrifugal governor as claimed in claim 3, in which the said bearing flange is provided at one end of a hub member, said hub member arranged to receive securing means for attaching it to a shaft, and further that said bearing flange includes a face remote from said hub member which comprises a plane surface and against which a face of said disc is adapted to abut. 
     
     
       6. A centrifugal governor as claimed in claim 3, in which an oil-collector container is secured to said first rotary member and forms an external stop for each said flyweight and also to prevent movement of each flyweight in a direction away from said disc. 
     
     
       7. A centrifugal governor as claimed in claim 1, in which said first rotary member has gear teeth on its outer periphery and constitutes a driving gear wheel. 
     
     
       8. A centrifugal governor as claimed in claim 7, in which said second rotary member is connected to a shaft which is thereby driven by said gear wheel. 
     
     
       9. A centrifugal governor as claimed in claim 8, in which said shaft is the cam shaft of a fuel injection pump for a diesel engine. 
     
     
       10. A centrifugal governor as claimed in claim 1, in which said disc is provided with elongate hole and is releasably attached to the first rotary member by bolts passing through said holes whereby, by slackening said bolts, an initial rotary adjustment is obtainable between said disc and said first rotary member.